1999 Lexus LX 470 Owners Manual - Page 355

FOUR-WHEEL DRIVE SYSTEM (a) Four-wheel drive control 31X013c Use the four-wheel drive control lever and center differential lock button to select the following transfer and center differential modes. The "H" position of the four-wheel drive control lever provides either lock or unlock mode of the center differential depending on the center differential lock button position. "H" (high speed position, center differential unlocked): Lever at "H", center differential lock button left out Use this for normal driving on all types of roads, from dry hard-surfaced roads to wet, icy or snow-covered roads. This position gives greater economy, quietest ride, least wear and better vehicle control. "H" (high speed position, center differential locked): Lever at "H", center differential lock button pushed in Use this for greater traction when you experience a loss of power, such as wheel slipping, in the center differential unlock mode.